Process of making toned printing-plates.



PL: TES,

MAKIN LIGATIO PROCESS matrix, and the overlay O is embedded into theupper side of'the wax, as indicated in Fig. 2. The frisket and wax arethen removed from the form, and the overlay removed from the back of thewax. The wax sheet or matrix lV now having an eveninp ression surface,and uneven back surface, 1s then placed in a suitable chamber, as byplacing it face uppermost upon a support.- ing bed B within achase C',as indicated in Fig. 3; and then the chamber containing this matrix W issealed, as by a top plate A, and into the closed chamber above thematrix W, Fi 3, compressed air or other suitable fluid 1s admitted withthe result that the matrix is reversed, that is the type surface of thematrix is pressed back where there were originally recesses in the backof the matrix, until the indentations that originally appeared in theback of the plate (formed by the overlay O) ap earV in the face of thematrix, as indicated) in Fig. 4. The matrix is then removed and itstoned face coated with metal,-in any well known Way as byelectrotyping,until a shell S is formed thereon, as indicated in Fig. 5.This shell S is then removed from the matrix and placed face downward ina suitable receiver, such as a chase Cz resting on the bed B, (F ig. 6)and a suitable amount of molten metal is poured into the chase C2 abovethe shell S to back the same and form a printing late of desiredthickness. Preferably the ace of the shell is supported during thebacking process by a suitably formed underlay U, so as to prevent theface of the shell being distorted in any way during the backingoperation, substantially as described in my Patent No. 952,312,0f 'March15, 1910. The plate comprising the shell S and backing M is then reducedto theydesired thick-y ness with a uniform plane surfaced back, bydressing or planing the back (as along the line m, Fig. 6)-in any Wellknown way;

and after the edges of the plate are trimmed it is ready for use. I

By properly building up or forming the overlay O, and ultimatelyreversing the wax matrix in the manner described, the intaglio type orprinting face of the matrix (Fig. 4) will be unequal, therebeingdepressions at certain points and relative projections at other points.While these projections and depressions are actually very minute theyare. nevertheless, suflicient when correspondingly reproducedin aprinting plate to cause such variations in the pressure of the paperthereagainst during the taking of impressions that the desired lightsand shades will appear in the impressions taken from such late. p Itwill be observed that when the shell S is formed as described itsprinting surface, which immediately contacts with that of the waxmatrix, will correspond exactly but reaforesaid patent.

versely to the tonedsurface of the matrixffimpression.

It will be noted that inthis'inventionA the toning of the plate iseffected by toning the matrix, and that the metal of the plate itself isnot treated nor stressed nor strained nor distorted in any way in orderto tone the plate.

. I preferably use the underlay U when backing up the shell and planingthe plate in order to prevent anyl distortion of the shell by the'heatof the metal .or'pressure, and not for the purpose of toning up the`plate at all; but simply to support the shell and prevent its saggingunder the heat and weight of the hot` metal pouredtliereon, Fig. 6, orunder the pressure of theY finishing tool, substantially as described inmy serves to hold or 'support the shell while it is being backedand-finished and not for the purpose of forming the tones.

If the matrix W', Fig. 4, be made of sultable material the plate mightbe directly cast therefrom, and the invention would be useful forproducing toned plates cast direct from a matrix formed and toned in themanner described.

Having described mv invention whatA I claim is:

1. The herein described process of making This underlayv U only` tonedprinting plates, consisting in first preparing a tonlng member, thenplacing matrix-material over the printing surface; then placing thetoning member upon the matrixv material and subjecting them Vtopressure, thereby producing an intaglio type surface in the face of thematrix; and depressions in the back of the matrix. corresponding to theprojections of the toning member; then reversing the matrix bysubjecting it to fluid pressure whereby the recesses formed by thetoning member in the back of the matrix are 'caused to appear in theface thereof, and finally forming a printing plate from said matrix;-said print-ing plate having its printing surface toned reversely tothe pre' viously toned face of the matrix.

2. The herein described process of making toned printing plates,consisting in placing a wax sheet over a form; placing an overlayagainst the back of the wax sheet; subjecting the sheet, overlay andform to pressure, thereby producing an intaglio type surface on the faceof the sheet and depressions in the back of the sheet corresponding tothe projections of the overlay; then subjecting the matrix to fluidpressure to cause the recesses formed by the overlay in the back vof thematrix to appear in the face thereof;

and finally forming a printingplate from tilt tti

narines said matrix,said printing plete having its tace toned inverselyto the previously toned face et the matrixa v 3. The herein describedprocess ot matting toned printing plates, consisting in placing' v asheet ot plastic material over a print form; placing a toning meiagainst the back of the said sheet; subjecting the sheet, member andform to pressure, thereby producing an intaglio-surface in thel tace otthe sheet trom the i'orm, and depressions in the baclr thereof from theprojections ot the toning member; then reversingr the matrix so that therecesses termed by the toning member are caused to appear in the face otthe matrix; then depositing a metal shell on the toned surface o saidmatrix; and finally removing said shell and baclring the same; theresultant printing plate having its tace toned reversely to the tonedtace et the matrix.

i. 'lhelierein described process ot melting toned printing plates,consisting in preparing an overlay; placing a Wax sheet over the form;placing the overlay against the back ot the wax sheet; .subjecting thesheet, overlay and form to pressure thereby producing a matrixhaving anintaglio surface in its face corresponding to the torni and depressionsin its back corresponding to the overlay; then causing the depressionsin the back ot the matrix to appear in the tace thereof; then depositinga metal shell on the tace of said matrix; and inally removing said shell.and backing same, the nished printing plate haring its tace tonedreversely to the previously toned tace ot the matrix.

'llhe herein described process ot melting toned prinntingr plates,consisting iniirst pre.

paring a toning member: placing a plastic sheet over a form; placing thetoning member upon the back ot the sheet, and subjecting the sheet,member and term to pressure thereby producing a matrix having anintaglio sui-tace on its tace, and depressions in its back; thensubjecting the matrix to duid pressure whereby 4the depressionsoriginally in the back ot the matrix are caused to appear in the tacethereot;lthen depositing a metal shell on the surface 'ot said matrix;then removing lthe matrix and supporting the surface of the shell on asuitable underlav to prevent distortion ot the toned snrlnce of theshell, and backing the shell While so supported to form 'a plate, saidplate having its face toned reversely to the previously toned tace ofthe matrix.

1. The herein vdescribed process ot makingtoned printing plates,consisting in first producing a matrix, then toning the back oi' thematrix, then toning the tace ot the matrix by making the projections anddepressions on its back a pear on its face., then depositing a metal sell on the toned tace ot the matrix, s then supporting -the tonedsurface ot' the shell on an underlay, and -nnally backing the tonedshell While soY supported.

i'. 'llhe herein described process ot mahn ing toned printing plates,consistin in placing plastic materialv -upon the torni, placing a toningmember upon the vplastic material; subjecting them` to pressure,thereby/'forming the material into a matrix having an .intaglio typesurface in itst'ace, and depressions in its back; then toning the faceci the matrix by causing the depressions in the back ofthe matrix toapear in the face thereof, and finally forining a printing plate fromsaid toned matrix.;v said printing plate having its printingA snrtacetoned reversely to the toned tace of the matrix.

t3. the herein described process of making toned printing plates,consisting in placingA plastic material lupon a term;

lplacing a toningmember over the plastic material; subjecting them topressure, thereby converting the material into a matrix having anintaglio type snrtace in its tace correspondingto the tace of the form,and depressions in its back coiresponding to the projections ot thetoning member; then toning the tace ot the matrix b 'clausing thedepressions in the back of the matrix to appear in .the tace thereof,and tinally forming a printing plate trom-said matrix; said printingplate having its rintingl surface toned reversely to the toned Iace otthe matrix.

9 'lhe herein described method ot malr-V ing toned printing plates,consisting lin torming a matrix in plastic materialftrom a printingsurface, reversely toning the back ot the matrix, then reversingI thematrix by pressure to make the tones ap ear `on its tace, then tormin ametal shel on the toned surface ot suc matrix and subsequentlybackingwsuch toned shell.

l0. 'lhe herein described process ot mal:- ing toned print-in plates,consisting in first reducing a matrix with toning inequalities 1n itsback, then reversing the 'matrix by fluid ressu're to tone its tace,then electrodepositing a metal shell on the toned tace o tllie matrix,and finally backing the toned s el 11. rl`he herein described method otmaking tonedprinting plates, consisting in making a suitable plasticmatrix, pressing the back of the matrix against a suitable toningsurface, subjecting the matrix to Huid pressure to cause the tones toappear in its face, then electro-depositin metal on the toned face ofthe matrix to orm a shell, and subsequently backing such toned shell toform a toned printing plate.

12. 'lhc herein described process of malring toned printing plates,consisting in first liti ing the toned shell while so supported.

. ing toned printing plates, consisting in iist producing a matrix'toned on its back, then subjecting the face of the matrix to fluidpressure to canse the tones to appear on its face, then de siting ametal shell on the toned face o the matrix, sup rti shellona reverseniiderlay, and nelly ack- 13. Th'e herein described processofmakproducing a matrix, then ton' the back of the matrix, then toning theace of the matrix by subjecting it to iiiid presure to cause the toneson its back to appear on its face, then depositing a metal shell on thetoned face of the matrix, said shell having its printi surface tonedreversely to the matrix, an finally backin the toned shell.

14. The herein describe: proces of making toned printing plates,consisting in first producing a matrix, thm ton' Vthe face of thematrix, and thea electroepositin a i shell on the face of the matrix andsu qi'ientli` backing such toned shell.- 5

15. he herein described method of maki ing .toned printing lates,consisting in forming a matrix in p ic material from a printing surface,toning the face of the plastic matrix by pressing the sameagainst a theLand d rmions on its back ap Ten depos LNI,

suitable toning member, then electro-depositing -a metal shell on thetoned surface of suchV matrix and subsequently backing such toned shell.

16.' The herein described process of making toned printing plates,consisting in llrst producing a matrix, then toning the matrix,

then eiectmdepositing a metal shell on the toned face of lthe matrix,sup rti the toned shellon an underlay, and nally cking the toned shell.

17. The herein described process of makingtoned printing plata,consisting in first lng a matrix, then toning the back o the nntrix,then subjecting the matrix to duid pressure to make the projections r onits face; t iting a metal ll on the toned face of the matrix, removingthe toned shell, supporting its face on an underlay, and finally backinthetoned shell.

In ttimony that I the foregoing as my own, I zix my signature inpresence of two witnees.

MICHAEL A. DROITCUR. Witnesses:

Emma Haselnuss, Snvm Wins

